Hm. Nanites do 30 DPS, over ten seconds it gives 300 damage...
Where do you get those numbers? It used to be 30 DPS over twenty seconds, so 600 damage. Now its 25 DPS over 25 seconds, so 625 damage for level 1.
875 for level 2 now. (And 1125 for level 3). He said he was using two Eggs, one at least lvl 2. So it is possible they were killing the Progen alone, (but not in 10 seconds - an obvious exaggeration). And yeah, he still probably needed some additional damage from fleet.
B-Tec, the main difference about Nano-Dissasembler is that it completely by-passes shields, (or applies damage directly to hull), thus damage isn't reduced by mitigation. So it is possible to kill something that still has shields remaining. Typical damage would have to first remove shields, and 50% mitigation means only half the damage is getting thru. So it is not uncommon for Nano-Dissambler damage to be equivalent to double (or even quadruple) typical damage.
Edit: Aw, now I get it... DPS for only 10 seconds, not the full duration.